<br>Hello Steemians!
Recently, I've been seeing a lot of posts related to education and I found them really interesting, so I decided to contribute something as well. <br>
Teaching is technically my second course/major next to Nursing, so I thought I could impart my knowledge and experiences here in both fields. So, I'm starting another series called, ***"Shei-sensei Series"***. <br>
***SENSEI*** (*先生 ；せんせい*）means **"teacher"** in Japanese. And in this series, I'll try to post information related to **Science** (*especially Biology since that's my major*), **English** (*I work as an ESL instructor now, so I'll post stuff to help you especially with grammar*) and **Medicine/Nursing**.  *Ohh! I'm learning Japanese at the moment, so I might share what I learn as well.* I hope you learn and enjoy my future posts!
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As a starter, I'm going to share some part of the class I had when I had my practice teaching a couple years ago. I taught Biology to grade 8 students...<br>
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<center>![](https://steemitimages.com/DQmWEQL4buNxkQP3kSHWPksYxoaxBu6wEcxjUiZxP7mNvtp/image.png)
[SOURCE](http://www.thebluedotpost.com/why-biodiversity-and-the-interconnected-web-of-life-are-important/)</center>


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# <center> TOPIC: Biodiversity</center>
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<center>https://steemitimages.com/DQme6BSaUsc7oJQqQDgKRfW4RrNbYgGwztPce1D3toJNYaj/image.png</center>
<sup> The screenshot above is from the lesson plan I made...</sup> 
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**BIODIVERSITY** comes from the word "bio" which means life and "diversity" which means a range of different things.  So basically, it includes all ecosystem, be it managed or unmanaged. <br>
***Managed Ecosystems*** are those that are inhabited and controlled by humans; whereas ***unmanaged ecosystems*** are those that are untouched (*for example: forests,wetlands, etc*)<br>
There are three levels of biodiversity.
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<center> https://steemitimages.com/DQmQpn6DSAZbhcPM6dZHppzANH25tBCpryKHuTgdYW9uov1/image.png</center>
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- ***SPECIES DIVERSITY*** 
> - it refers to the variety of life forms on earth.
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<center>![](https://steemitimages.com/DQmUmzsryDYNwEEVLFPvnW1nCHcegiaMxofAKXtDFHZX5na/image.png)<br>
![](https://steemitimages.com/DQmYHhjxPMJXyvw17VCrcugXLz6vc1ZQ8Pv5N5hEvdrNeMC/image.png)
[SOURCE](http://prt2008g2.blogspot.com/2015/10/)</center>

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- ***GENETIC DIVERSITY***
> - it refers to the variety of genetic makeup or characteristics of an organism
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<center>![](https://steemitimages.com/DQmNvGoCErEti5xTrrmKN6gh24C5vaxXpTVzxmG5qADayGM/image.png)
[SOURCE](https://phys.org/news/2014-09-reveals-loss-mexico-maize-genetic.html)</center>

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- ***ECOSYSTEM DIVERSITY***
> - it refers to the variations of habitats, communities in the planet
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<center>![](https://steemitimages.com/DQmcBpN5GaxAemq5wnkTMwXp9A4Nb2Za2FXULPvJfD5dVQb/image.png)
[SOURCE](http://artsbridgejackiewebster2014.blogspot.com/2014/12/habitats-lesson-one.html)</center>

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Next part of the module I used for this lesson was the introduction to various ***Plant and Animal Kingdoms***, but let's skip that for now and focus more on Biodiversity and this next topic..
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<div class="pull-right"><img src="https://steemitimages.com/DQmcHFbPiauQ5hPhYqhj8SMLqQAYcr9RaCfmsntHnV4JRvF/image.png" /></div>
<div class="left"><img src="https://steemitimages.com/DQmWjb4ULYbx6BsZpsSYAkLsGFmmcFBbGvAttH8FcMJNVjP/image.png" /></div>
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Let's talk about the ***Causes of Species Decline***...
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From the textbook we used in class, (*Science Learners' Module by the Department of Education*)the causes of species decline can be enumerated using the acronym "HIPPO".
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### <center>H - Habitat Destruction</center>

<br>When the natural habitats of species are destroyed, they'll no longer be able to support the species living in that certain area. Some of the species move to another area, while some of them die. Thus, destroying the balance or displacing "biodiversity".
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<center>![](https://steemitimages.com/DQmZ2awhFfNKY4m8Z7fsYQdRhiAAYMs7U81DsRXTCfGFwME/image.png)
[SOURCE](http://www.bio.utexas.edu/faculty/sjasper/Bio301M/habitat_destruct.html)</center>

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### <center>I - Invasion of Introduced Species</center>

<br>It happens when a certain organism tries to invade another territory. That organism will then spread and reproduce, which will then damage the area it invaded.
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<center>![](https://steemitimages.com/DQmZ98UAnVezmV6SgpUx7DJx3j5ySTYw5fc7aaQuVteBzkF/image.png)
[SOURCE](https://desertification.wordpress.com/category/ecology-environment/invasive-species/)</center>

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### <center>P - Population Increase</center>

<br>The growth of population can actually damage biodiversity. The population would need more space to take up in order to live, thus affecting the natural ecosystem. 
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<center>![](https://steemitimages.com/DQme7PMbWrMuwgDzrUMaeyMPf1gHaU79w9DZpJ9rvffE7nv/image.png)
[SOURCE](http://urban.yale.edu/research/theme-4)</center>

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### <center>P - POLLUTION</center>
<br>It has a harmful and poisonous effect in the environment, thus destroying biodiversity.
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<center>![](![](https://steemitimages.com/DQmbewxPdbFvQbUUZuRZdPUnR3AzdiNTtVtfQ37ACad3UqK/image.png))
[SOURCE](http://discovermagazine.com/tags/pollution)</center>

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### <center>O - Overcollection or Overharvesting of Resources</center>

<br>This is also known as *"Overexploitation"*. It refers to the over-usage of natural resources. We tend to use our natural resources without replacing them. In the long run, it will cause destruction or loss of the resources. Thus, destroying biodiversity.
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<center>![](https://steemitimages.com/DQmaM1xzc5ZoVwXVARvspvxXQShdmeWi6NYa67xHtbVLMFL/image.png) 
[SOURCE](https://en.wikipedia.org/wiki/Exploitation_of_natural_resources)</center>

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These are some parts of the first module I taught to my grade 8 students before.. And now, let me end this post with the homework I gave them and some of my students' work.
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<center>![](https://steemitimages.com/DQmUDDw7SFKXYufWvoPgUhTVHHg9R9EM8pYggBwDCAqTMBf/image.png)</center>

#### <center>Here are my students' works...
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![P_20170930_143401.jpg](https://steemitimages.com/DQmRgUMe8upug3ojVtbjDbBZvcLCQGQVpXF9KQA52A62ciQ/P_20170930_143401.jpg)
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![P_20170930_143524.jpg](https://steemitimages.com/DQmTAXt8cAsGWbeMgbqf3ENHN7wkbQYZe7wXWCyEYqmskQf/P_20170930_143524.jpg)</center>

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### Sad, but true... isn't it? 
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Now, dear Steemians... what do you think we should do to help our mother earth survive? (^_^)
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Sources: 
(1) https://www.greenfacts.org/en/biodiversity/l-3/1-define-biodiversity.htm
(2) DepEd Science Module for Grade 8 
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That's all for now...
Thanks a lot for dropping by!
Love lots, @tegoshei